This attempts to detect if there are migrations in-progress and will
force display an interstitial page in the process that attempts to
load the index page every 10s until it succeeds.
This is only attached in production settings so the development
environment can proceed even if the migrations haven't been applied yet
* The django middleware call stack behavior is changed by DRF. As a
result, during the process_request in sso/middlware.py request.user
is not set as you would expect it to be set from the middleware
django.contrib.auth.middleware.AuthenticationMiddleware
don't assume that the callback URL contains the correct social_auth
backend name; instead, store it temporarily in the session at
`/login/sso/`
see: #5324
* Move auth backends into sso app.
* Add support for mapping social auth users into organizations and teams.
* Return social auth backends in a consistent order in the API.
* Remove custom SAML attribute mapping and use options provided by PSA.
* Add pipeline function to raise an exception if no user has been found or created; added comments on how to disable new user creation.
* Add comments for defining a custom social auth pipeline function.
* Fix an issue I created overriding authenticate
* Fix up attribute mapping using an identity provider class. The
methods built into django-social-auth for saml are probably not going
to work. We also now expose those mappings in a settings attrs map
that the user can override.
